The reveal took place during one of Bran Stark's visions, where he traveled back in time and visited the famous Tower of Joy. He follows his father Ned Stark up the tower to find Lyanna bloodied on her death bed, where she pleads with young Ned to raise and protect her newborn son, Jon Snow.

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Actor Isaac Hempstead Wright, who plays Bran, talked to The Hollywood Reporter about that game-changing scene and how he thinks it'll affect the future of the show. The young actor, 17, broke down how his character must have felt watching that vision take place.

"When Bran sees his father's reaction and understands that this is a surrogate child his father has brought up, he thinks to himself, 'Well, wait, what surrogate children has my father brought up? Oh! Jon Snow! So Jon Snow isn't my half-brother.' But we still are pretty clueless as to the father, I think," he said.

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Though the famed R+L=J theory suggests that Daenerys's deceased older brother Rhaegar Targaryen is Jon's father, Wright joked otherwise. "And at this stage, it could even be Ned. There could be a Cersei and Jaime thing going on there," he said with a laugh. Let's hope that's not true.

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Now that Bran knows the truth about Jon, how is he going to tell him? Since he's already heading south, Wright imagines he'll travel to Winterfell to tell his half-brother (now cousin) the truth.

"I don't know how Bran's going to break it to Jon," he told THR. "He hasn't seen him in years. 'Hey, yeah, by the way, I'm a tree wizard now, and dad's not your father.' (Laughs) I think Jon will go, 'You've been spending way too much time in the cave, mate.'"

If Bran ever does make it back to Winterfell, it's possible that he could be jealous of Jon's promotion to King in the North and might want the position for himself. As far as everyone else knows, he is a more legitimate heir to the title as Ned Stark's biological son. But Wright assured Bran isn't interested in that. "I think he knows it's not for him. He's not a leader, as such," he explained.

Bran would also learn about Rickon's death upon his return. Out of all the Stark children, the news would probably hit him the hardest, since he escaped Winterfell and traveled with Rickon before sending him off with Osha the Wildling.

"It's a gutting thing for Bran, whenever he finds out. He made the executive decision to send Rickon off on his own with Osha. He trusted both of them to keep safe and protect themselves. I think Bran will certainly feel a slight amount of responsibility with what's happened," Wright said.

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All this Winterfell talk is still a mere possibility for Bran, as he makes his way down from north of The Wall. Regardless of where that journey leads him, there'll be a lot in store for him in the next—and final—two seasons of GoT.

"God knows how we're going to make a conclusion out of this massive thriving mess of murders and death and ice zombies and all sorts," Wright said, "but it's going to be pretty spectacular."